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STOCK-BASED COMPENSATION (Details) (USD $) | 12 Months Ended
--- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Number of shares of common stock that may be issued (in shares) | 1,250,000 |  |
Stock Option Awards [Abstract] |  |  |
Common stock closing price (per share) | $ 45.00 |  |
Fair Value Assumptions and Methodology [Abstract] |  |  |
Risk free interest rate | 0.32% | 0.39% | 0.79%
Expected dividend yield of stock | 0.00% | 0.00% | 0.00%
Expected volatility of stock | 19.60% | 23.21% | 33.42%
Vesting period | 2 years 9 months 18 days | 2 years 9 months 18 days | 2 years 9 months 18 days
Total equity compensation cost | $ 4,453,000 | $ 2,707,000 | $ 3,980,000
Compensation cost capitalized | (1,366,000) | (808,000) | (924,000)
Compensation cost recognized in net income | 3,087,000 | 1,899,000 | 3,056,000
Income tax benefit recognized in net income | (1,182,000) | (733,000) | (1,179,000)
Compensation cost recognized in net income, net of income tax | 1,905,000 | 1,166,000 | 1,877,000
Total unrecognized compensation cost | 4,900,000 |  |
Weighted average period cost to be recognized (in years) | 2 years |  |
Restricted Stock Awards [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Vested (in shares) | 91,221 | 90,839 | 94,500
Vested restricted stock withheld for tax withholding obligations (in shares) | 23,311 | 30,052 | 32,373
Vested restricted stock withheld for tax withholding obligations, weighted average price (in dollars per share) | $ 39.96 | $ 40.02 | $ 35.90
Fair value, restricted stock | 3,800,000 | 4,200,000 | 3,600,000
Actual tax benefit realized | 1,400,000 | 1,600,000 | 1,400,000
Shares/ Units |  |  |
Vested (in shares) | (91,221) | (90,839) | (94,500)
Stock Option Awards [Abstract] |  |  |
Actual tax benefit realized | 1,400,000 | 1,600,000 | 1,400,000
Restricted Stock Awards [Member] | Time Vested Restricted Stock and Time Vested Restricted Stock Units [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Granted (in shares) | 59,124 |  |
Granted, weighted average grant date fair value (per share) | $ 40.00 |  |
Vested (in shares) | 43,785 |  |
Shares/ Units |  |  |
Nonvested at September 30, 2012 (in shares) | 115,115 |  |
Granted (in shares) | 59,124 |  |
Vested (in shares) | (43,785) |  |
Forfeited (in shares) | (11,050) |  |
Nonvested at September 30, 2013 (in shares) | 119,404 |  |
Weighted Average Grant Date Fair Value |  |  |
Nonvested at September 30, 2012 (in dollars per share) | $ 36.54 |  |
Granted (in dollars per share) | $ 40.00 |  |
Vested (in dollars per share) | $ 34.95 |  |
Forfeited (in dollars per share) | $ 38.61 |  |
Nonvested at September 30, 2013 (in dollars per share) | $ 38.64 |  |
Restricted Stock Awards [Member] | Non Employee Directors [Member] | Time Vested Restricted Stock and Time Vested Restricted Stock Units [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Granted (in shares) | 15,200 |  |
Granted, weighted average grant date fair value (per share) | $ 39.92 | $ 41.36 | $ 39.48
Shares/ Units |  |  |
Granted (in shares) | 15,200 |  |
Weighted Average Grant Date Fair Value |  |  |
Granted (in dollars per share) | $ 39.92 | $ 41.36 | $ 39.48
Restricted Stock Awards [Member] | Executive Officers and Key Employees [Member] | Performance Contingent Restricted Stock and Stock Units [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Granted (in shares) | 108,419 |  |
Granted, weighted average grant date fair value (per share) | $ 34.49 | $ 36.55 | $ 30.68
Vested (in shares) | 47,436 |  |
Shares/ Units |  |  |
Nonvested at September 30, 2012 (in shares) | 232,403 |  |
Granted (in shares) | 108,419 |  |
Vested (in shares) | (47,436) |  |
Forfeited (in shares) | (51,118) |  |
Nonvested at September 30, 2013 (in shares) | 242,268 | 232,403 |
Weighted Average Grant Date Fair Value |  |  |
Nonvested at September 30, 2012 (in dollars per share) | $ 30.89 |  |
Granted (in dollars per share) | $ 34.49 | $ 36.55 | $ 30.68
Vested (in dollars per share) | $ 27.61 |  |
Forfeited (in dollars per share) | $ 26.11 |  |
Nonvested at September 30, 2013 (in dollars per share) | $ 34.15 | $ 30.89 |
Restricted Stock Awards [Member] | Executive Officers and Key Employees [Member] | Time Vested Restricted Stock and Time Vested Restricted Stock Units [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Granted (in shares) | 43,924 |  |
Granted, weighted average grant date fair value (per share) | $ 40.03 | $ 39.72 | $ 35.93
Shares/ Units |  |  |
Granted (in shares) | 43,924 |  |
Weighted Average Grant Date Fair Value |  |  |
Granted (in dollars per share) | $ 40.03 | $ 39.72 | $ 35.93
Stock Option Awards [Member] |  |  |
Restricted Stock Awards [Abstract] |  |  |
Actual tax benefit realized | 400,000 | 400,000 | 100,000
Stock Options |  |  |
Outstanding at September 30, 2012 (in shares) | 214,000 |  |
Granted (in shares) | 0 |  |
Exercised (in shares) | (80,500) |  |
Forfeited (in shares) | 0 |  |
Expired (in shares) | 0 |  |
Outstanding at September 30, 2013 (in shares) | 133,500 | 214,000 |
Fully Vested and Expected to Vest at September 30, 2013 (in shares) | 133,500 |  |
Exercisable at September 30, 2013 (in shares) | 133,500 |  |
Weighted Average Exercise Price |  |  |
Outstanding at September 30, 2012 (in dollars per share) | $ 31.02 |  |
Granted (in dollars per share) | $ 0.00 |  |
Exercised (in dollars per share) | $ 29.61 |  |
Forfeited (in dollars per share) | $ 0.00 |  |
Expired (in dollars per share) | $ 0.00 |  |
Outstanding at September 30, 2013 (in dollars per share) | $ 31.87 | $ 31.02 |
Fully Vested and Expected to Vest at September 30, 2013 (in dollars per share) | $ 31.87 |  |
Exercisable at September 30, 2013 (in dollars per share) | $ 31.87 |  |
Stock Options (Additional Information) |  |  |
Outstanding at End of Period, weighted average remaining contractual term - stock options (in years) | 2 years 9 months 18 days |  |
Fully Vested and Expected to Vest at End of Period, weighted average remaining contractual term - stock options (in years) | 2 years 9 months 18 days |  |
Exercisable at End of Period, weighted average remaining contractual term - stock options (in years) | 2 years 9 months 18 days |  |
Outstanding Ending Balance, aggregate intrinsic value - stock options | 1,752,000 |  |
Fully Vested and Expected to Vest at End of Period, aggregate intrinsic value - stock options | 1,752,000 |  |
Exercisable at End of Period, aggregate intrinsic value - stock options | 1,752,000 |  |
Stock Option Awards [Abstract] |  |  |
Exercise price range , minimum (in dollars per share) | $ 28.85 |  |
Exercise price range , maximum (in dollars per share) | $ 34.95 |  |
Cash received from the exercise of stock options | 2,700,000 | 2,500,000 | 900,000
Intrinsic value of exercised | 1,000,000 | 1,000,000 | 200,000
Actual tax benefit realized | $ 400,000 | $ 400,000 | $ 100,000
Minimum [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Vesting period, minimum (in years) | 3 years |  |

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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(4) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Net number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and expected to vest options that are exercisable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of exercisable share options (fully vested and expected to vest) that may be converted as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price (at which grantees can acquire the shares reserved for issuance) for exercisable stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for fully vested and expected to vest options that are exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition As of the balance sheet date, the weighted-average exercise price for outstanding stock options that are fully vested or expected to vest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. + References No definition available. + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired. + References No definition available. + Details
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- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. + References No definition available. + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References No definition available. + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Number of share options (or share units) exercised during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.28,29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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